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https://issues.apache.org/jira/browse/HIVE-1539?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12901356#action_12901356
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Bennie Schut commented on HIVE-1539:
------------------------------------

thanks Paul, I didn't notice that yet so in theory it shouldn't be the cause. 
However after synchronizing the metastore client I never saw this problem again 
where I used to see this problem every day.
Strange issue. I'll see if I can create something reproducible but that might 
be tricky for this type of problem.

> Concurrent metastore threading problem 
> ---------------------------------------
>
>                 Key: HIVE-1539
>                 URL: https://issues.apache.org/jira/browse/HIVE-1539
>             Project: Hadoop Hive
>          Issue Type: Bug
>          Components: Metastore
>    Affects Versions: 0.7.0
>            Reporter: Bennie Schut
>            Assignee: Bennie Schut
>         Attachments: thread_dump_hanging.txt
>
>
> When running hive as a service and running a high number of queries 
> concurrently I end up with multiple threads running at 100% cpu without any 
> progress.
> Looking at these threads I notice this thread(484e):
> at 
> org.apache.hadoop.hive.metastore.ObjectStore.getMTable(ObjectStore.java:598)
> But on a different thread(63a2):
> at 
> org.apache.hadoop.hive.metastore.model.MStorageDescriptor.jdoReplaceField(MStorageDescriptor.java)

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